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In the expansion of `(3sqrt4+1/(4sqrt6))^20`A. (i),(iii)B. (ii),(iii)C. (i),(ii)D. All three |
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Answer» Correct Answer - 2 `T _(r+1)=""^(20)Cr.4^((20-r)/(3))6^((-r)/(4),r=0` `(20-r)/(3),(r)/(4)` both must be intergers. `therefore r=8,20` ` therefore 2 Rational Terms ` & 19 Irrational Terms Also middle term is Irrational . |
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